NAVS oil in adhesive powder in a volume ratio 2:1, to apply on the affected mucosa three times daily during 4 weeks for OLP patients; NAVS oil in adhesive powder in a volume ratio 2:1, to apply on the affected mucosa three times daily during 5 days for RAS patients

0.05% Betamethasone dipropionate in adhesive powder in a volume ratio 1:1, to apply on the affected mucosa three times daily during 4 weeks for OLP patients; 0.05% Betamethasone dipropionate in adhesive powder in a volume ratio 1:1, to apply on the affected mucosa three times daily during 5 days for RAS patients

Oral Lichen Planus

Recurrent Aphthous Stomatitis

NAVS Naphthalan

0.05% Betamethasone dipropionate

School of Dental medicine, University of Zagreb

Topical "Non-Aromatic Very Rich in Steranes" (NAVS) Naphthalan for the Treatment of Oral Mucosal Diseases

Nonaromatic Naphthalan - Composition Study and Biological Effects on Epithelial Tissues

Clinical improvement of OLP lesions after treatment will be scored (Pibooniyom et al.,2005). This clinical scale measures the presence of reticular, erythematous and ulcerative lesions on oral mucosal surfaces, providing a score by adding those values.
Investigator will assess patients' lesions on oral mucosal surfaces, on day 0 and day 28 and provide score for each assessment. The change of this score between the two time points is a measure of clinical efficacy of applied treatment modality.
Calibration process : three examiners independently reviewed and evaluated photo of the individual patient. The second evaluation of photographs was a week after to assess the objectivity of the reading on the first visit. Once the examiners reviewed the photographs twice with one-week gap, the obtained results were analysed using Spearman "rank" correlation to determine intra- and inter-observer reliability.

The number of RAS lesions will be recorded on day 0 and on day 5 after the start of treatment (Khandwala et al, 1997). The change in the number of lesions between the two time points is a measure of clinical efficacy of applied treatment modality.

The change in the diameter of RAS lesions (in millimeters) will be recorded on day 0 and on day 5 after the start of treatment (Khandwala et al, 1997). The change in the cumulative diameter of lesions between the two time points is a measure of clinical efficacy of applied treatment modality.

The intensity of pain and discomfort will be determined using a 100 mm visual analog scale (VAS) on day 0 and day 28. The change in the amount between the two time points is a measure of clinical efficacy of applied treatment modality.

The quality of life for OLP patients will be determined using "Oral health impact profile"(OHIP-14) questionnaire on day 0 and day 28. The change in the amount between the two time points is a measure of clinical efficacy of applied treatment modality.

The intensity of pain and discomfort will be determined using a 100 mm visual analog scale (VAS) 30 and 60 minutes after the application of the therapeutic agent at home. The change in the amount between the two time points is a measure of clinical efficacy of applied treatment modality.

The quality of life for RAS patients will be determined using "Oral health impact profile"(OHIP-14) questionnaire on day 0 and day 5. The change in the amount between the two time points is a measure of clinical efficacy of applied treatment modality.

In OLP patients application of both treatment modalities lasts for 28 days. The occurrence of oral Candidal infection or irritation will be recorded by clinician on day 28. The frequency of each will be compared between two treatment groups.

hydrocarbon/atrophy

Topical "Non-Aromatic Very Rich in Steranes" (NAVS) Naphthalan for the Treatment of Oral Mucosal Diseases

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